</pre>

<h3 id="Handling_panics">Handling panics</h3>

<p> Two built-in functions, <code>panic</code> and <code>recover</code>,
assist in reporting and handling <a href="#Run_time_panics">run-time panics</a>
and program-defined error conditions.
</p>

<pre class="grammar">
func panic(interface{})
func recover() interface{}
</pre>

<p>
While executing a function <code>F</code>,

</p>

<p>
The return value of <code>recover</code> is <code>nil</code> when the
goroutine is not panicking or <code>recover</code> was not called directly by a deferred function.
Conversely, if a goroutine is panicking and <code>recover</code> was called directly by a deferred function,
the return value of <code>recover</code> is guaranteed not to be <code>nil</code>.

scanned by the garbage collector.
</li>
<li>
<code>WRAPPER</code> = 32
<br>
(For <code>TEXT</code> items.)
This is a wrapper function and should not count as disabling <code>recover</code>.
</li>
<li>
<code>NEEDCTXT</code> = 64
<br>
(For <code>TEXT</code> items.)
This function is a closure so it uses its incoming context register.
</li>
<li>
<code>LOCAL</code> = 128
<br>